body {
    font-family: "Lato", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 14px;
}

.main-menu {
    background: #f2f2f2;
    border-right: 1px solid #2E9AFE;
    position: fixed;
    top: 85px;
    left: 0;
    bottom: 0px;
    height: auto;
    width: 60px;
    overflow: hidden;
    -webkit-transition: width .05s linear;
    transition: width .05s linear;
    transform: rotate(180deg);
    -webkit-transform: translateZ(0) scale(1, 1);
    -ms-transform: translateZ(0) scale(1, 1);
    -o-transform: translateZ(0) scale(1, 1);
    z-index: 999999;
}

.fa-menu {
    position: relative;
    display: table-cell;
    width: 60px;
    height: 36px;
    text-align: center;
    vertical-align: middle;
}

.derecha,
.izquierda {
    font-size: 16px;
    top: 10px;
}

.derecha {
    margin-right: 20px;
}

.main-menu ul li.open a .derecha {
    /*B. Este estio permite rotar la fecla del submenú*/
    transform: rotate(180deg);
    -webkit-transform: rotate(180deg);
    -ms-transform: rotate(180deg);
    -o-transform: rotate(180deg);
}

.main-menu:hover,
nav.main-menu.expanded {
    width: 250px;
    overflow: visible;
}

.main-menu>ul {
    margin: 7px 0;
}

.main-menu li {
    position: relative;
    display: block;
    width: 250px;
    font-weight: 700;
}

.main-menu li>a {
    display: table;
    border-collapse: collapse;
    border-spacing: 0;
    color: #777;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    text-decoration: none;
    transform: initial;
    -webkit-transform: translateZ(0) scale(1, 1);
    -webkit-transition: all .1s linear;
    transition: all .1s linear;
}

.main-menu .nav-text {
    position: relative;
    display: table-cell;
    vertical-align: middle;
    width: 190px;
    font-family: Arial, Helvetica, sans-serif;
}

.main-menu>ul.logout {
    position: absolute;
    left: 0;
    bottom: 0;
}

a:hover,
a:focus {
    text-decoration: none;
}

nav {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
}

nav ul,
nav li {
    outline: 0;
    margin: 0;
    padding: 0;
}

.main-menu li:hover>a,
nav.main-menu li.active>a {
    color: rgb(117, 117, 117);
    background-color: rgb(253, 253, 253);
    border-bottom: 1px solid #2E9AFE;
    border-left: 5px solid #2E9AFE;
    color: #2E9AFE;
}

.submenu {
    display: none;
}

.main-menu .menu .activado>a {
    background: #2E9AFE;
    color: #f2f2f2;
}

.main-menu ul li ul li a {
    background-color: rgb(139, 136, 136);
    color: #f2f2f2;
    border-bottom: 1px solid #f2f2f2;
}

@media only screen and (max-width: 600px) {
    .main-menu {
        top: 75px;
    }
}